Study population Part I took place during the months of January 2007 to June 2007 and children attending the 1st (15-16 years) and 2nd (16-17 years) classes in all public and private Lyceia schools across the Republic of Cyprus were invited to participate. The targeted population were 19849 children that participated in an earlier study in years 2001-3 and had amongst other assessments anthropometric measurements, assessment of cardio-respiratory fitness and serum lipids taken at that time.